Effect of calendering and temperature on electrolyte wetting in lithium-ion battery electrodes

Davoodabadi, Ali; Li, Jianlin; Zhou, Hui; Wood, David L.; Singler, Timothy J.; Jin, Congrui

doi:10.1016/j.est.2019.101034

Cited by 67 publications

(65 citation statements)

References 16 publications

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“…This may be explained by complicated transfer of lithium ion species inside the electrode layer due to a variation in the pore structure after calendering. It is known that a high compression rate of the electrode reduces its porosity resulting in poorer wettability by an electrolyte . At the same time, an increase in the roll temperature results in both better C‐rate performance and cycling stability, which may be associated with becoming PVDF more flexible at higher temperature and, as a result, improvement the adhesion strength and electrical interface between cathode layer and current collector .…”

Section: Resultsmentioning

confidence: 99%

On the Use of Carbon Nanotubes in Prototyping the High Energy Density Li‐ion Batteries

et al. 2020

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This article is devoted to the laboratory technology aspects of high areal capacity electrode (more than 5 mAh cm−2) fabrication using carbon nanotubes (CNTs) as conductive additives and LiFePO4 as an active material. The influence of electrode slurry rheological properties and electrode composition on its areal (mAh cm−2), volumetric (mAh cm−3), and gravimetric (mAh g−1) capacity, and C‐rate performance has been studied. Using the small‐angle neutron scattering technique, it is shown that the CNT network embedded in the electrode layer provides greater wettability by an electrolyte compared with carbon black used as conductive additive. The practical applicability of the considered electrode technology is approved on a pouch cell prototype with a capacity of approximately 1.9 Ah and specific energy density of 150 Wh kg (cell)−1/295 Wh L (cell)−1.

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Section: Resultsmentioning

confidence: 99%

On the Use of Carbon Nanotubes in Prototyping the High Energy Density Li‐ion Batteries

et al. 2020

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“…Davoodabadi et al [154] studied how the solvent's porosity was affected by different graphite anodes and NMC532 cathodes and for different levels of calendering. The solvent drastically changed the cathode structure's porosity, and the NMP-processed graphite anodes showed a higher wettability compared to the aqueous processed anodes.…”

Section: Calenderingmentioning

confidence: 99%

Opportunities for the State-of-the-Art Production of LIB Electrodes—A Review

Bryntesen¹,

Strømman²,

Tolstorebrov³

et al. 2021

Energies

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A sustainable shift from internal combustion engine (ICE) vehicles to electric vehicles (EVs) is essential to achieve a considerable reduction in emissions. The production of Li-ion batteries (LIBs) used in EVs is an energy-intensive and costly process. It can also lead to significant embedded emissions depending on the source of energy used. In fact, about 39% of the energy consumption in LIB production is associated with drying processes, where the electrode drying step accounts for about a half. Despite the enormous energy consumption and costs originating from drying processes, they are seldomly researched in the battery industry. Establishing knowledge within the LIB industry regarding state-of-the-art drying techniques and solvent evaporation mechanisms is vital for optimising process conditions, detecting alternative solvent systems, and discovering novel techniques. This review aims to give a summary of the state-of-the-art LIB processing techniques. An in-depth understanding of the influential factors for each manufacturing step of LIBs is then established, emphasising the electrode structure and electrochemical performance. Special attention is dedicated to the convection drying step in conventional water and N-Methyl-2-pyrrolidone (NMP)-based electrode manufacturing. Solvent omission in dry electrode processing substantially lowers the energy demand and allows for a thick, mechanically stable electrode coating. Small changes in the electrode manufacturing route may have an immense impact on the final battery performance. Electrodes used for research and development often have a different production route and techniques compared to those processed in industry. The scalability issues related to the comparison across scales are discussed and further emphasised when the industry moves towards the next-generation techniques. Finally, the critical aspects of the innovations and industrial modifications that aim to overcome the main challenges are presented.

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“…The electrolyte imbibition rate has been found to be inversely proportional to calendering intensity. [81] Once the cell is fully wetted, the edges of the pouch are sealed to prevent any leaking electrolyte or air contamination ( Figure 10.1j). After the cell is sealed, it is cycled through several slow charge and discharge cycles.…”

Section: Industrial/commercial Manufacturing Process Descriptionmentioning

confidence: 99%

Operation, Manufacturing, and Supply Chain of Lithium-ion Batteries for Electric Vehicles

Belharouak

Nanda

Self

et al. 2020

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Effect of calendering and temperature on electrolyte wetting in lithium-ion battery electrodes

Cited by 67 publications

References 16 publications

On the Use of Carbon Nanotubes in Prototyping the High Energy Density Li‐ion Batteries

On the Use of Carbon Nanotubes in Prototyping the High Energy Density Li‐ion Batteries

Opportunities for the State-of-the-Art Production of LIB Electrodes—A Review

Operation, Manufacturing, and Supply Chain of Lithium-ion Batteries for Electric Vehicles

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